College leaders are reportedly urging the NCAA to enforce new name, image and likeness guidelines, or else athletics directors have said schools who have struck deals should be sanctioned.

College leaders are strongly urging the NCAA enforcement team to begin investigating what they deem to be obvious recruiting violations, past and present, Ross Dellenger of Sports Illustrated reported. Donor-led collectives that have struck deals with players before they sign binding letters of intent are violating rules, Colorado athletic director Rick George said, one of the leaders of an NCAA working group that will soon publicize additional NIL guidelines.

“This is the time we have to put our stake in the ground. Enough! This is not acceptable,” George said. “What we’re doing is not good for intercollegiate athletics, and it has got to stop.”

At issue are deals that officials have said are encouraging current players to remain on their teams and inducing recruits to sign with their schools.

The guidance clarifies existing NCAA bylaws that prohibit boosters from being involved in recruiting. Any booster or booster-led collective that has been found to have associated with prospects about recruiting—on another college team or in high school—will be found to have violated NCAA rules and put the booster’s school at risk of sanctions, George says. In addition, a booster, or booster-run collectives, “cannot communicate with a student-athlete or others affiliated with a student-athlete to encourage them to remain enrolled or attend an institution.”